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Finding the Fourth Proportional to 108,487.89, 149,680.90 and 70,186.77

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Solution

The fourth proportional to 108,487.89, 149,680.90 and 70,186.77 is: 96,836.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,487.89 : 149,680.90 = 70,186.77 : x
  2. Step 2: Convert to fraction form
    108,487.89/149,680.90 = 70,186.77/x
  3. Step 3: Cross multiply
    108,487.89x = 149,680.90 × 70,186.77
  4. Step 4: Simplify right side
    108,487.89x = 10,505,618,550.76
  5. Step 5: Solve for x
    x = 10,505,618,550.76/108,487.89
  6. Step 6: Final answer
    x = 96,836.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.